NASA’s Curiosity rover, slated to land next week, is the centerpiece of a $2.5-billion project. Some argue for rolling back spending, but proponents say knowing our celestial neighbor is in the nation’s best interest. Saturn has its famous rings and Jupiter is the granddaddy of the solar system, but no planet has entranced earthlings quite like Mars.
Humans have launched 40 spacecraft to the Red Planet, lured by the prospect that life might once have existed in what is now dry rocks and sand. The latest machine to make the journey isNASA’sMars Science Laboratory, a hulking, souped-up lab-on-wheels that will plunge toward the Martian surface next week.
But even as excitement builds, some wonder: Is Mars exploration a good investment?